Question: Who was the Dean of Pompeu Fabra University as of June 18, 1990?
Paraphrase: What was the name of Pompeu Fabra University's Dean on June 18, 1990?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q24543 p:P1075 ?s . ?s ps:P1075 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1990')) }